文件名批量前后互换改名

原文件名为
9913466张三.mp3
8765683721李四.amr
64356677658王五.m4a
需要把汉字提到最前面，例如
张三9913466.mp3
谢谢啦

import os
import re

def rename_files(directory):
    files = os.listdir(directory)
    for file in files:
        if os.path.isfile(os.path.join(directory, file)):
            new_name = re.sub(r'(\d+)(\D+)(\.\w+)', r'\2\1\3', file)
            if new_name != file:
                os.rename(os.path.join(directory, file), os.path.join(directory, new_name))

directory = '所在目录'

rename_files(directory)